Product comparison · 2 servers

Dell PowerEdge R420 vs Dell PowerEdge R520

Key differences

Differences highlightedShow differences only

Comparison of PowerEdge R420, PowerEdge R520
100 specifications	A Dell PowerEdge R420 View product	B Dell PowerEdge R520 View product
Processor4 differ
Processor modelDiffers	E5-2403	E5-2407
Processor frequencyDiffers	1.8 GHz	2.2 GHz
Number of processors installedDiffers	1	2
Processor codeDiffers	SR0LS	SR0LR
Memory1 differ
Internal memoryDiffers	4 GB	8 GB
Storage7 differ
Maximum storage capacityDiffers	12 TB	24 TB
Total storage capacityDiffers	300 GB	146 GB
HDD capacityDiffers	300 GB	146 GB
HDD sizeDiffers	3.5"	2.5"
Number of HDDs supportedDiffers	4	8
Internal drive baysDiffers	4	8
Optical drive typeDiffers	DVD-ROM	DVD-RW
RAID levelsKnown for one	Unknown — not stated by the source	1
Expansion slots1 differ
PCI Express x8 slotsKnown for one	1	Unknown — not stated by the source
PCI Express x16 slotsDiffers	1	4
Design1 differ
Chassis typeDiffers	Rack (1U)	Rack (2U)
Processor special features1 differ
Processor ARK IDDiffers	64615	64614
Power3 differ
Redundant power supply (RPS) supportDiffers	No	Yes
Number of power supply unitsDiffers	1	2
Power supplyDiffers	550 W	750 W
Other features1 differ
Disk array controllerDiffers	PERC H310	PERC H710 512MB

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.